This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The near point of a farsighted person's uncorrected eyes is 80 cm. What power contact lens should be ... (Read 73 times)

tichca

  • Hero Member
  • *****
  • Posts: 554
on: Jul 29, 2018
The near point of a farsighted person's uncorrected eyes is 80 cm. What power contact lens should be used to move the near point to 25 cm from this person's eyes?
 
  A) 2.8 diopters
  B) -2.8 diopters
  C) -4.0 diopters
  D) -4.2 diopters
  E) 4.2 diopters

Question 2

A man is nearsighted and cannot see things clearly beyond 110from his eyes. What is the focal length of the contact lenses that will enable him to see very distant objects clearly?
 
  A) 50 cm
  B) -50 cm
  C) -110 cm
  D) 110 cm
  E) -30 cm

Question 3

A nearsighted physicist cannot see things clearly beyond 90 cm from her eyes. What is the power of the contact lenses that will enable her to see very distant objects clearly?
 
  A) 1.1 diopters
  B) -1.1 diopters
  C) -1.7 diopters
  D) -2.2 diopters
  E) 2.2 diopters


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

yahahah24021

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

You just saved me a lot of time. ;)

Answer to Question 3

B


tichca

  • Member
  • Posts: 554
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

smrtceo

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Living in groups and the many eyes hypothesis. Living in groups and the many eyes hypothesis.
Infants often rely on a caregiver as a secure base when they meet a new person. Infants often rely on a caregiver as a secure base when they meet a new person.
A dual-trace scope pattern showing both the power and the waste spark from the same coil ... A dual-trace scope pattern showing both the power and the waste spark from the same coil ...
Food security per person Food security per person
Two-point discrimination Two-point discrimination
A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the ... A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the ...
Video: Virtual Tour of the Heart

For a complete list of videos, visit our video library